Ezekiel 44:16-18

Young's Literal Translation

¹⁶ they come in unto My sanctuary, and they draw near unto My table to serve Me, and they have kept My charge.

¹⁷ And it hath come to pass, in their going in unto the gates of the inner court, linen garments they put on; and no wool cometh up on them in their ministering in the gates of the inner court and within.

¹⁸ Linen bonnets are on their head, and linen trousers are on their loins, they are not restrained with sweat.